本文選題：測(cè)距碼與載波一致性 + 偽碼-載波偏離度監(jiān)測(cè)器　； 參考：《中國(guó)民航大學(xué)》2017年碩士論文

【摘要】：全球?qū)Ш叫l(wèi)星系統(tǒng)(Global Navigation Satellite System,GNSS)接收機(jī)對(duì)每顆衛(wèi)星產(chǎn)生測(cè)距碼和載波相位兩個(gè)基本距離觀測(cè)值。由于受電離層延遲效應(yīng)、多路徑的影響,或者由于衛(wèi)星發(fā)射源工作性能不理想等因素的影響,導(dǎo)航信號(hào)的測(cè)距碼與載波表現(xiàn)出不同的傳輸特性,導(dǎo)致同一顆衛(wèi)星在同一頻率上相鄰兩個(gè)歷元的測(cè)碼偽距的增量與該相鄰兩個(gè)歷元測(cè)相偽距的增量不一致。測(cè)距碼與載波的一致性評(píng)估對(duì)于監(jiān)測(cè)衛(wèi)星信號(hào)質(zhì)量,使其滿(mǎn)足導(dǎo)航定位精度和可靠性需求至關(guān)重要。針對(duì)這一問(wèn)題,論文開(kāi)展基于北斗系統(tǒng)的測(cè)距碼與載波一致性評(píng)估與驗(yàn)證。主要內(nèi)容如下:(1)設(shè)計(jì)北斗系統(tǒng)測(cè)距碼與載波一致性評(píng)估整體方案,分析偽碼-載波偏離度(Code-Carrier Divergence,CCD)監(jiān)測(cè)器的設(shè)計(jì)思想,按照CCD模型的具體組成,給出CCD監(jiān)測(cè)值以及檢測(cè)門(mén)限的數(shù)學(xué)描述,并針對(duì)單點(diǎn)多系統(tǒng)多頻接收機(jī)接收的北斗系統(tǒng)原始觀測(cè)數(shù)據(jù)進(jìn)行實(shí)驗(yàn)處理。(2)基于多頻組合觀測(cè)值方法,對(duì)北斗系統(tǒng)原始觀測(cè)數(shù)據(jù)進(jìn)行預(yù)處理,實(shí)現(xiàn)整周模糊度的確定,以及周跳的探測(cè)與修復(fù),通過(guò)實(shí)驗(yàn),驗(yàn)證多頻組合觀測(cè)值方法理論分析的正確性。(3)利用卡爾曼濾波法對(duì)衛(wèi)星和接收機(jī)硬件延遲偏差進(jìn)行估算,通過(guò)實(shí)驗(yàn)具體給出各顆衛(wèi)星的硬件延遲偏差結(jié)果。(4)針對(duì)電離層的兩種不同狀態(tài),分別選擇不同的方法對(duì)北斗系統(tǒng)測(cè)距碼與載波一致性進(jìn)行評(píng)估。實(shí)驗(yàn)驗(yàn)證北斗系統(tǒng)各顆衛(wèi)星不同頻率上測(cè)距碼與載波一致性偏差是否達(dá)到國(guó)際民航組織(International Civil Aviation Organization,ICAO)對(duì)碼載波發(fā)散的要求。
[Abstract]:The global Navigation Satellite system GNSS receiver generates two basic distance observations for each satellite, ranging code and carrier phase. Because of the effect of ionospheric delay, multipath, or the poor performance of satellite transmitter, the ranging code of navigation signal shows different transmission characteristics from carrier. As a result, the increment of the code pseudo-range between two adjacent epochs on the same frequency is inconsistent with the increment of the pseudo-range measured by the adjacent two epochs. The consistency evaluation of ranging code and carrier is very important to monitor the quality of satellite signal and make it meet the requirements of navigation accuracy and reliability. In order to solve this problem, this paper carries out the range code and carrier consistency evaluation and verification based on Beidou system. The main contents are as follows: (1) the overall scheme for evaluating the range code and carrier consistency of Beidou system is designed, and the design idea of the pseudo-code-carrier deviation monitor is analyzed. According to the concrete composition of the CCD model, The mathematical description of CCD monitoring value and detection threshold is given, and the experimental processing of the original observation data of Beidou system received by a single point and multi-system multi-frequency receiver is carried out. The original observation data of Beidou system are preprocessed to determine the ambiguity of whole cycle, and to detect and repair the cycle slip. To verify the correctness of the theoretical analysis of the multi-frequency combined observation method. (3) using Kalman filtering method to estimate the delay deviation of satellite and receiver hardware. The result of hardware delay deviation of each satellite is given. (4) aiming at two different states of ionosphere, different methods are selected to evaluate the consistency of ranging code and carrier in Beidou system. It is verified by experiments that the deviation of ranging code and carrier consistency on different frequencies of Beidou satellite meets the requirements of ICAO International Civil Aviation Organization (ICAO) for code carrier divergence.
【學(xué)位授予單位】：中國(guó)民航大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TN967.1

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